Honeywell T8624 Owner's Manual

Honeywell T8624 Manual

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  • Honeywell T8624 | Owner's Manual - Page 1
    Programmable Multistage Thermostat OWNER'S GUIDE
  • Honeywell T8624 | Owner's Manual - Page 2
    is a precision instrument that's quality-built to give you many years of satisfactory service. It's a "smart" thermostat that lets you save energy while still maintaining the standard of comfort you want in your home. This Owner's Guide will show you how to get the most benefit from your new
  • Honeywell T8624 | Owner's Manual - Page 3
    at a glance. Set different schedules for weekdays, Saturday, and Sunday. Choose manual or automatic thermostat operation. Program up to four different time periods in each schedule. Features Check status light to see if the thermostat is on, even in the dark. Set the temperature warmer or cooler
  • Honeywell T8624 | Owner's Manual - Page 4
    temperature setting 29 Maintaining Your Thermostat 31-34 Removing the thermostat 31 Replacing the thermostat 32 Replacing the batteries 33 Power outages 34 Glossary 35-36 Your Personal Program 37-38 Troubleshooting Guide 39-40 Chronotherm® III Thermostat Questions ......... 41-42 Quick
  • Honeywell T8624 | Owner's Manual - Page 5
    CONTROL OVER INDOOR TEMPERATURE AND HUMIDITY. HONEYWELL CHRONOTHERM ® lll PROGRAMMABLE THERMOSTAT HOME VENTILATION SYSTEM HONEYWELL FRESH AIR DEHUMIDISTAT CONTROL HONEYWELL ELECTRONIC AIR CLEANER PERFORMANCE STATUS INDICATOR HONEYWELL RESIDENTIAL SECURITY SYSTEM CONDITIONED AIR RETURN AIR
  • Honeywell T8624 | Owner's Manual - Page 6
    manufactures the following components of a Perfect Climate System: 1. Honeywell Chronotherm® Programmable Thermostats 2. Honeywell F50, the air cleaners of choice 3. Honeywell Dehumidistats 4. Honeywell Home Ventilation Systems 5. Honeywell F76 Water Filter 6. Honeywell Home Security Systems iii
  • Honeywell T8624 | Owner's Manual - Page 7
    ADAPTIVE INTELLIGENT RECOVERY™ ADAPTIVE INTELLIGENT RECOVERY™-BREAKTHROUGH TECHNOLOGY SENSES TEMPERATURE MORE LIKE YOU DO M168 1
  • Honeywell T8624 | Owner's Manual - Page 8
    sense only air temperature, which may or may not reflect how hot or cold the room actually feels to a human being. s The Chronotherm III Thermostat reads the temperature of the wall as well as the air-and responds to temperature changes as little as one degree Fahrenheit-so room temperature
  • Honeywell T8624 | Owner's Manual - Page 9
    SET PT SUN MON TUE WED THU FRI SAT COOL ON HEAT ON WAKE LEAVE RETURN SLEEP TEMPORARY UNOCCUIPIED Recovery Continues ENERGY SAVINGS PERIOD RECOVERY FROM ENERGY SAVINGS TIME COMFORT PERIOD M3780 s The Chronotherm III Thermostat is actually a small but powerful computer. When calculating the
  • Honeywell T8624 | Owner's Manual - Page 10
    start time accordingly. It typically takes four to eight days after installation for the Chronotherm III Thermostat to adjust to the weather, your life style, home construction and heating/cooling system. The thermostat calculates the LEAVE/RETURN recovery separately from the SLEEP/WAKE recovery
  • Honeywell T8624 | Owner's Manual - Page 11
    for when you want your home comfortable. The thermostat will decide how early to begin the temperature changes. NOTE: Some models will show 32° F instead of the current temperature, indicating the thermostat is operating on backup batteries until the thermostat is mounted on the wallplate and the
  • Honeywell T8624 | Owner's Manual - Page 12
    on the wall or in your hand. SEE PAGE 31 TO FIND OUT HOW TO REMOVE THE THERMOSTAT FROM THE WALL. Always press the keys with your fingertip or similar blunt tool. Sharp instruments like a pen or day and time. Go on to Step 2. PM MON PM TUE PM TUE M5015 M5016 M5017 PROGRAMMING YOUR 6 THERMOSTAT
  • Honeywell T8624 | Owner's Manual - Page 13
    by programming the WAKE time and temperature for weekdays. The thermostat requires a program for WAKE. You can program LEAVE, RETURN and SLEEP or not, as you please. Press and release. Note that the display WAKE SET HEAT/COOL DAY AHEAD BACK shows WAKE and the preprogrammed time and temperature
  • Honeywell T8624 | Owner's Manual - Page 14
    starts to blink while you are holding down TEMPERATURE WARMER or COOLER, you have reached the setting limit. If your thermostat can switch automatically between heating and cooling, the heating temperature must be at least three degrees below the air conditioning temperature. For example, if the
  • Honeywell T8624 | Owner's Manual - Page 15
    PROGRAMMING YOUR THERMOSTAT Program the LEAVE time and temperature, if desired. NOTE: You can cancel time. MON TUE WED THU FRI LEAVE AM MON TUE WED THU FRI LEAVE SET PT ON HEAT M5021 SET PT ON HEAT M5022 WARMER COOLER Press and hold until the display shows the desired temperature. AM MON TUE
  • Honeywell T8624 | Owner's Manual - Page 16
    and hold until the display shows the desired starting time. MON TUE WED THU FRI RETURN SET PT ON HEAT M5024 PM MON TUE WED THU FRI RETURN SET PT ON HEAT M5025 WARMER COOLER Press and hold until the display shows the desired temperature. PM MON TUE WED THU FRI RETURN
  • Honeywell T8624 | Owner's Manual - Page 17
    PROGRAMMING YOUR THERMOSTAT Program the SLEEP time and temperature, if desired. SLEEP Press and release. The display shows SLEEP and the preprogrammed time and temperature. PM MON TUE WED THU FRI SLEEP SET PT ON HEAT M5027 AHEAD BACK Press and hold until the display shows the desired starting
  • Honeywell T8624 | Owner's Manual - Page 18
    . Use the same procedure as for weekdays. DAY WAKE SLEEP Press and release until SAT appears on the display. PM SAT SLEEP SET PT ON HEAT M5029 Press WAKE, LEAVE, RETURN or SLEEP to select the time period. LEAVE RETURN AHEAD BACK Use the AHEAD/BACK keys to set the time
  • Honeywell T8624 | Owner's Manual - Page 19
    to set the time and the WARMER/ COOLER keys to set the temperature. You have completed setting the program schedule and heating temperatures. To set air conditioning, go to Step 3. WARMER COOLER If you do not want to program cooling temperatures, skip Step 3 and press the RUN PROGRAM key. 13
  • Honeywell T8624 | Owner's Manual - Page 20
    the TIME AHEAD and BACK keys as described in Step 2. But if you change times for cooling, you are also changing them for heating! First program the WAKE temperature for weekdays. WAKE SET HEAT/COOL DAY Press and release. The display shows WAKE and the time and temperature you programmed for SUN
  • Honeywell T8624 | Owner's Manual - Page 21
    reached the setting limit. If your thermostat can switch automatically between heating and cooling, the cooling temperature must be at least three degrees higher than the corresponding heating temperature. For example, if the heating setting is 70° F, the minimum cooling setting is 73° F. If you
  • Honeywell T8624 | Owner's Manual - Page 22
    and release. The display shows LEAVE, the time programmed for heating, and 78° F. Press and hold until the display shows the desired temperature. AM MON TUE WED THU FRI LEAVE COOL SET PT M5035 AM MON TUE WED THU FRI LEAVE COOL SET PT M5036 Program the RETURN temperature, if desired. RETURN
  • Honeywell T8624 | Owner's Manual - Page 23
    YOUR THERMOSTAT Program the SLEEP temperature, if desired. SLEEP Press and release. WARMER COOLER Press and hold until the display shows the desired temperature. PM MON TUE WED THU FRI SLEEP COOL SET PT M5039 PM MON TUE WED THU FRI SLEEP COOL SET PT M5040 Set the cooling temperatures
  • Honeywell T8624 | Owner's Manual - Page 24
    COOLER Use the WARMER/COOLER keys to set the temperature. Set the cooling temperatures for the SUNDAY schedule. Use the same procedure as for weekdays. DAY WAKE SLEEP Press and hold until SUN appears on the display. SUN PM SLEEP COOL SET PT M5042 Press WAKE, LEAVE, RETURN or SLEEP to select
  • Honeywell T8624 | Owner's Manual - Page 25
    PROGRAMMING YOUR THERMOSTAT WARMER COOLER Use the WARMER/COOLER keys to set the temperature. You have completed programming the cooling temperatures. RUN PROGRAM Press and release to start the program. Go to Step 4. TUE LEAVE PM SET PT M5043 19
  • Honeywell T8624 | Owner's Manual - Page 26
    4 SET THE SYSTEM AND FAN SWITCHES ON THE SUBBASE. Depending on thermostat model, some of the switch positions shown may not be available to . The fan starts and stops with the furnace in some electric heat systems and with the compressor in heat pump systems. FAN ON AUTO FAN ON AUTO M3763 20
  • Honeywell T8624 | Owner's Manual - Page 27
    , read on to learn about the operating flexibility that makes this thermostat THE SMART CHOICE. OFF: Both the heating and cooling systems are off. You have finished programming your thermostat. HEAT AUTO If you removed it from the wall to program, replace it following the procedure on page 32
  • Honeywell T8624 | Owner's Manual - Page 28
    22
  • Honeywell T8624 | Owner's Manual - Page 29
    OPERATING YOUR THERMOSTAT TEMPORARILY CHANGING THE PROGRAM These features let you customize the program for those times when someone comes home early, or you're staying up late,
  • Honeywell T8624 | Owner's Manual - Page 30
    COOLER Press and hold until the desired temperature is reached. The display will flash TEMPORARY until the next programmed time period starts. ON HEAT TEMPORARY M5046 If you change your mind: RUN PROGRAM Press and release to cancel any of the temporary settings. PM TUE LEAVE M5047 OPERATING
  • Honeywell T8624 | Owner's Manual - Page 31
    OPERATING YOUR THERMOSTAT PERMANENTLY CHANGING THE PROGRAM If your schedule changes or you want a different temperature, you can update any setting without affecting other program settings. WAKE SLEEP
  • Honeywell T8624 | Owner's Manual - Page 32
    MANUALLY OPERATING THE THERMOSTAT This feature is particularly useful when you go on vacation After a few seconds, the display will show the current temperature. SET PT ON HEAT M5048 SET PT ON HEAT M5049 PRESENT SETTING Press and release to check the temperature setting. RUN PROGRAM Press and
  • Honeywell T8624 | Owner's Manual - Page 33
    CANCELING THE PROGRAM SETTINGS The thermostat requires time and temperature settings in the WAKE period, but any of the others can be canceled. Weekday, Saturday and ). MON TUE WED THU FRI LEAVE RUN PROGRAM Press and release to return to normal operation. PM MON RETURN ON HEAT M5052 M5053 27
  • Honeywell T8624 | Owner's Manual - Page 34
    the desired period key. The start time and temperature setting will appear on the display. PM MON TUE WED THU FRI SLEEP SET PT ON HEAT M5054 Press and release to display the DAY next daily time and temperature for that period. RUN PROGRAM Press and release to return to normal
  • Honeywell T8624 | Owner's Manual - Page 35
    revert to the room temperature. During recovery from energy savings, the setting displayed will not match the programmed setting. This is because the thermostat gradually changes the temperature setting during recovery to provide most efficient use of the heating or cooling equipment. SET PT ON
  • Honeywell T8624 | Owner's Manual - Page 36
    30
  • Honeywell T8624 | Owner's Manual - Page 37
    at the bottom corners of the case. 2 Pull out the thermostat from the bottom. 3 Lift the thermostat up and off the subbase. MON MORNIMG PM ROOM HEAT ON SYSTEM RUN PROGRAM SET PRESENT DAY/TIME DAY HOLD TEMP SET HEAT/COOL PERIOD WAKE LEAVE SLEEP RETURN TIME AHEAD TEMPERATURE PRESENT
  • Honeywell T8624 | Owner's Manual - Page 38
    REPLACING THE THERMOSTAT 1 Hang the thermostat on the tabs at the top of the subbase. 2 Swing down and press on the lower edge until the thermostat snaps into place. 3 Tighten the captive screws. HEAT AUTO COOL OFF FAN ON AUTO M3759 MON RETURN PM HEAT ON SYSTEM AUTO M3757 MON MORNIMG PM
  • Honeywell T8624 | Owner's Manual - Page 39
    MAINTAINING YOUR THERMOSTAT REPLACING THE BATTERIES Your thermostat uses three AAA alkaline batteries. We recommend Energizer® batteries. The display will flash REPL BAT when the batteries get low. Unless the display is blank (indicating the batteries are dead) when you start, you will not have to
  • Honeywell T8624 | Owner's Manual - Page 40
    power outages. Once the power is restored, the system will resume normal operation. If the display goes off when power is lost, either the backup batteries need to be replaced or are not installed. When power is restored, the display will flash 1:00 PM to remind you to reprogram. 34
  • Honeywell T8624 | Owner's Manual - Page 41
    your thermostat at the factory. It sets a night program that provides energy savings if you don't set your own program, or if your personal program is lost for any reason. The program, which is the same for all days of the week, is: Start Temperature Period Time Heating Cooling WAKE
  • Honeywell T8624 | Owner's Manual - Page 42
    SLEEP period start times and temperatures that you program to run on Sundays. GLOSSARY SYSTEM light (yellow) This light (located on thermostat) glows whenever the thermostat is calling for heating or cooling. Time period One of four program periods: WAKE, LEAVE, RETURN and SLEEP available with the
  • Honeywell T8624 | Owner's Manual - Page 43
    you choose not to program a daytime energy savings period, leave the LEAVE and RETURN periods blank. PERIOD WAKE LEAVE RETURN SLEEP START TIME Weekday Program HEATING TEMPERATURE COOLING TEMPERATURE PERIOD WAKE LEAVE RETURN SLEEP START TIME Saturday Program
  • Honeywell T8624 | Owner's Manual - Page 44
    PERIOD WAKE LEAVE RETURN SLEEP START TIME Sunday Program HEATING TEMPERATURE COOLING TEMPERATURE YOUR PERSONAL 38 PROGRAM
  • Honeywell T8624 | Owner's Manual - Page 45
    automatic heat-cool changeover, the COOL temperature setting must be at least 3° F above the HEAT temperature setting. s Programming has been lost because of a power outage. You must reprogram. s Check that backup batteries are installed correctly. Replace when necessary. Reprogram the thermostat
  • Honeywell T8624 | Owner's Manual - Page 46
    temperature setting. s If desired, change the time or temperature setting. See page 25. s Allow time for the heating equipment to heat up before checking for heat at the register. s Install fresh AAA alkaline batteries. We recommend Energizer® batteries. (See page 33.) TROUBLESHOOTING 40 GUIDE
  • Honeywell T8624 | Owner's Manual - Page 47
    when the furnace comes on in the morning? First, the Chronotherm III Thermostat is a very accurate instrument designed to sense both air temperature and will take a few days after installation to adapt to your home. With Adaptive Intelligent Recovery™, the thermostat will turn on the furnace as
  • Honeywell T8624 | Owner's Manual - Page 48
    change the thermostat setting, also wasting energy). 6. Why don't all thermostat models have AUTO (automatic) changeover from heating to cooling? Most times within a given 24-hour period. 7. Sometimes my Chronotherm III Thermostat doesn't allow the house temperature to drop to my SLEEP setting
  • Honeywell T8624 | Owner's Manual - Page 49
    RETURN Set the day of the week and select the program day during programming. Select the time period to program or review. SET HEAT/COOL Switch between heat and cool modes during programming or when reviewing the program. Set the time ahead and back. AHEAD Hold either key down to change the
  • Honeywell T8624 | Owner's Manual - Page 50
    WARMER COOLER Set the temperature while programming and temporarily change the temperature during operation. Hold down either key to change the setting faster. HOLD TEMP Hold any temperature you desire for an extended period. CHANGE TO LAST PERIOD Change the temperature to the set point of the
  • Honeywell T8624 | Owner's Manual - Page 51
    31 Replacing batteries 33 Replacing thermostat 32 SLEEP 30,35 Saturday program .......... 12, 35, 37 Set cooling temperatures 14 Set current day 6 Set current time 6 Set fan switch 20 Set heating temperatures 7 Set program schedule 7 Set system switch 21 Setback 35 Setting limits
  • Honeywell T8624 | Owner's Manual - Page 52
    , 36, 38 Switch, fan 20 Switch, system 21 System light 35 System switch 21 Table of Contents i Temporary program changes ..... 23 Time 6 Time period 36 Troubleshooting 39 WAKE 36, 43 Weekday program ..... 7, 14, 36, 37 *See the product features inside the front cover. INDEX 46
  • Honeywell T8624 | Owner's Manual - Page 53
    excluding battery, to be free from defects in the workmanship or materials, under normal use and service, for a period of one (1) year from the date of purchase by the consumer. If, at any time during the warranty period, the product is defective or malfunctions, Honeywell shall repair or replace it
  • Honeywell T8624 | Owner's Manual - Page 54
    48
  • Honeywell T8624 | Owner's Manual - Page 55
    49
  • Honeywell T8624 | Owner's Manual - Page 56
    (see Glossary, page 35). But it's an easy matter to program the thermostat to fit your lifestyle. 1 Set the current time and day. See page 6. 2 Set the program schedule and heating temperatures. See page 7. 3 Set the cooling temperatures. See page 14. 4 Set the system and fan switches. See page
  • Honeywell T8624 | Owner's Manual - Page 57
    Home and Building Control Honeywell Inc. 1985 Douglas Drive North Golden Valley, MN 55422 Home and Building Control Helping You Control Your World Honeywell Limited-Honeywell Limitée 740 Ellesmere Road Scarborough, Ontario M1P 2V9 QUALITY IS KEY C.H. • Printed in Taiwan R.O.C. • Form Number
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Programmable Multistage Thermostat
OWNER’S GUIDE